Getting CLR object property raises Unable to cast COM object of type 'System.__ComObject'

I'm trying to get the value of a property via reflection, but end up getting the following exception:

System.Reflection.TargetInvocationException: 'Exception has been thrown by the target of an invocation.'

Inner Exception: InvalidCastException: Unable to cast COM object of type 'System.__ComObject' to interface type 'Microsoft.Kinect.Interop.INuiColorCameraSettings'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{00A4B392-E315-470C-90B7-F7B4C3CE00C4}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)).

My code looks like the following, where src is an istance of Microsoft.Kinect.ColorCameraSettings, and propName = "Brightness":

var prop = src.GetType().GetProperty(propName);
if (prop != null)
{
    return prop.GetValue(src, null);
}

I've also tried the supposedly more COM-friendly method, but with the same issue:

return src.GetType().InvokeMember(propName, System.Reflection.BindingFlags.GetProperty, null, src, null);

Most interestingly, there is nothing to suggest that src is a COM object: src.GetType().IsCOMObject returns false

But it seems from the inner exception stack trace that the src object internally interacts with a COM object.

   at System.StubHelpers.StubHelpers.GetCOMIPFromRCW(Object objSrc, IntPtr pCPCMD, IntPtr& ppTarget, Boolean& pfNeedsRelease)
   at Microsoft.Kinect.Interop.INuiColorCameraSettings.GetBrightness(Double& pBrightness)
   at Microsoft.Kinect.NuiColorCameraSettings.GetBrightness()
   at Microsoft.Kinect.ColorCameraSettings.get_Brightness()

How can I get the value of this property via reflection at runtime?

Edit: Here is what the Threads window looks like when the exception is thrown

EDIT: Been meaning to update this. Solution here is to run the code on the correct thread, which in this case is a worker from the thread pool. Simply wrapping the call with a Task.Run() works well. The exception (for me at least) isn't very clear about the underlying cause.

Been meaning to update this. Solution here is to run the code on the correct thread, which in this case is a worker from the thread pool. Simply wrapping the call with a Task.Run() works well. The exception (for me at least) isn't very clear about the underlying cause.